>>It doesn't make sense. You don't have whole date, so how long should
>>month be? 28? 29? 30? 31?
>>
>
> It does. As long the months between January and October are.
> So
> select age ('10-10-1999'::timestamp , '1-1-1999'::timestamp ) ;
> age
> ---------------
> 9 mons 9 days
> (1 row)
>
> Regards, Christoph
Your example above is related to some real date, so we know how many
days each month have. When using interval - we don't know how many days
each month should have. beacuse interval is unrelated to date.
Tomasz
